11051515253421 has 12 divisors (see below), whose sum is σ = 15965349378940. Its totient is φ = 7366730880960.

The previous prime is 11051515253413. The next prime is 11051515253423. The reversal of 11051515253421 is 12435251515011.

11051515253421 is a `hidden beast` number, since 1 + 1 + 0 + 5 + 1 + 51 + 52 + 534 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4568431737321 + 6483083516100 = 2137389^2 + 2546190^2 .

It is not a de Polignac number, because 11051515253421 - 2³ = 11051515253413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11051515253423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78755560 + ... + 78895761.

Almost surely, 2^{11051515253421} is an apocalyptic number.

It is an amenable number.

11051515253421 is a deficient number, since it is larger than the sum of its proper divisors (4913834125519).

11051515253421 is a wasteful number, since it uses less digits than its factorization.

11051515253421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157659116 (or 157659113 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

Adding to 11051515253421 its reverse (12435251515011), we get a palindrome (23486766768432).

The spelling of 11051515253421 in words is "eleven trillion, fifty-one billion, five hundred fifteen million, two hundred fifty-three thousand, four hundred twenty-one".